期刊
PHYSICAL REVIEW LETTERS
卷 101, 期 18, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.181301
关键词
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资金
- Merton College. C. C
- NRF (South Africa)
We propose consistency tests for the cosmological constant which provide a direct observational signal if Lambda is wrong, regardless of the densities of matter and curvature. As an example of its utility, our flat case test can warn of a small transition of the equation of state w(z) from w(z)=-1 of 20% from SNAP (Supernova Acceleration Probe) quality data at 4-sigma, even when direct reconstruction techniques see virtually no evidence for deviation from Lambda. It is shown to successfully rule out a wide range of non-Lambda dark energy models with no reliance on knowledge of Omega(m) using SNAP quality data and a large range for using 10(5) supernovae as forecasted for the Large Synoptic Survey Telescope.
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